自定义字体和XML布局（安卓） [英] Custom fonts and XML layouts (Android)

问题描述

我试图定义使用Android的XML文件的GUI布局。据我可以找到，有没有办法来指定你的部件应该使用自定义字体（例如，一个你放在资产/ FONT /）在XML文件中，你只能使用系统安装的字体。

I'm trying to define a GUI layout using XML files in Android. As far as I can find out, there is no way to specify that your widgets should use a custom font (e.g. one you've placed in assets/font/) in XML files and you can only use the system installed fonts.

我知道，在Java code，我可以手动更改使用唯​​一ID每个插件的字体。或者，我可以遍历Java中所​​有的部件，使这一变化，但是这很可能是非常缓慢的。

I know that, in the Java code, I could change the font of each widget manually using unique IDs. Alternatively, I could iterate over all the widgets in Java to make this change, but this would probably be very slow.

我有什么其他选择？有没有使这一具有自定义外观部件没有更好的办法呢？我并不特别希望有手动更改字体为每一个新的小工具我补充。

What other options do I have? Is there any better ways to making widgets that have a custom look? I don't particularly want to have to manually change the font for every new widget I add.

推荐答案

您可以扩展TextView中设置自定义的字体，我学会的这里。

You can extend TextView to set custom fonts as I learned here.

TextViewPlus.java：

package com.example;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Typeface;
import android.util.AttributeSet;
import android.util.Log;
import android.widget.TextView;

public class TextViewPlus extends TextView {
    private static final String TAG = "TextView";

    public TextViewPlus(Context context) {
        super(context);
    }

    public TextViewPlus(Context context, AttributeSet attrs) {
        super(context, attrs);
        setCustomFont(context, attrs);
    }

    public TextViewPlus(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        setCustomFont(context, attrs);
    }

    private void setCustomFont(Context ctx, AttributeSet attrs) {
        TypedArray a = ctx.obtainStyledAttributes(attrs, R.styleable.TextViewPlus);
        String customFont = a.getString(R.styleable.TextViewPlus_customFont);
        setCustomFont(ctx, customFont);
        a.recycle();
    }

    public boolean setCustomFont(Context ctx, String asset) {
        Typeface tf = null;
        try {
        tf = Typeface.createFromAsset(ctx.getAssets(), asset);  
        } catch (Exception e) {
            Log.e(TAG, "Could not get typeface: "+e.getMessage());
            return false;
        }

        setTypeface(tf);  
        return true;
    }

}

attrs.xml：（在RES /值）

attrs.xml: (in res/values)

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <declare-styleable name="TextViewPlus">
        <attr name="customFont" format="string"/>
    </declare-styleable>
</resources>

main.xml中：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:foo="http://schemas.android.com/apk/res/com.example"
    android:orientation="vertical" android:layout_width="fill_parent"
    android:layout_height="fill_parent">

    <com.example.TextViewPlus
        android:id="@+id/textViewPlus1"
        android:layout_height="match_parent"
        android:layout_width="match_parent"
        android:text="@string/showingOffTheNewTypeface"
        foo:customFont="saxmono.ttf">
    </com.example.TextViewPlus>
</LinearLayout>

您会把saxmono.ttf在资产的文件夹。

You would put "saxmono.ttf" in the assets folder.

有使用这种方法严重的记忆担忧。请参阅<一href="http://stackoverflow.com/questions/2376250/custom-fonts-and-xml-layouts-android/7197867?noredirect=1#comment-11263047">chedabob's下面的评论。

There are serious memory concerns with this method. See chedabob's comment below.

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